Accession Number : ADD013530

Title :   High Efficiency Gyrotron Oscillator and Amplifier.

Descriptive Note : Patent, Filed 11 Mar 80, patented 25 Jan 83,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Sprangle, Phillip A ; Smith, Robert A ; Chu, Kwo R ; Read, Michael E

Report Date : 25 Jan 1983

Pagination or Media Count : 7

Abstract : An electron cyclotron maser high-frequency generator/amplifier having a cavity resonator positioned in an axial magnetic field. A spiralling beam of relativistic electrons is injected into the cavity and stimulated emission of radiation by the electrons takes place at the frequency of a wave mode supported by the cavity resonator. The transverse efficiency, defined as the average electron energy loss divided by its initial transverse energy, is maximized by disposing a shaped iron collar about the cavity resonator to provide an axial magnetic field in the cavity resonator whose amplitude increases in the beam direction-of-travel. In an alternative embodiment, the transverse efficiency is maximized by tapering the inner wall of the cavity in the axial direction to provide a wave-mode in the cavity resonator whose electric-field amplitude increases in the beam direction-of-travel.

Descriptors :   *CAVITY RESONATORS, *ELECTRIC FIELDS, *GYROTRONS, *MAGNETIC FIELDS, *PATENTS, AMPLITUDE, COLLARS, EFFICIENCY, ELECTRON ENERGY, ELECTRONS, EMISSION, HIGH RATE, INTERNAL, IRON, LOSSES, OSCILLATORS, SHAPE, STIMULATION(GENERAL), TRANSVERSE, TRANSVERSE WAVES, WALLS, WAVES

Subject Categories : Electrical and Electronic Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE